Boring and facing appliance.



0. A. NIEMAN. BORING AND FACING APPLIANCE. APPLICATION FILED AUG.12, 1911. 1 1 l9 528 Patented Dec. 1, 1914.

I Z a way 4 aflozmu s I IIIIIIL WWI wows THE NORRIS PETERS 60.. PHOTO'LITHQ, WASHINGTON, D. c

0min A. mnivmn, 01 new YORK, n. Y.

BORING AND FAoI'nG A PLIANCE:

Specification of Letters Patent.

Patented Dec 1, 191.4.

Application filed August 12, 1911. Serial No. 643,707.

To all whom it may concern Be it known thatI, Oman A. NIEMAN, a citizen of the United States, residing at the city of New York, in the borough of Bronx and State of New York, have invented certain new and useful Improvements in Boring and Facing Appliances, of which the following is a full, clear, andexact description.

This invention relates to boring and fac ing appliances, and more particularly toa counterboring device comprising a tool and novel means for holding the same to the work.

One of the objects of my invention is to facilitate the handling of tools of this description and in fact to render possible counterboring or finishing operations in positions which have been heretofore practically inaccessible in certain classes of work. These and other objects of my invention will be hereinafter referred to and more particularly pointed out in the appended claims.

Referring to the drawings which form a part hereof and in which like reference characters designate like parts throughout the several views: Figure 1 is an elevation of an appliance embodying the principles of my invention, the tool proper of the said appliance being disposed in counterboring position. Fig. 2 is a detail view showing the tool disposed in boring position'upon the spindle, a portion of thetool and spindle being broken away for the purpose of illustration Fig. 3 is a vertical section of a modified form of the appliance, the supporting spindle being partly shown in full. Fig. 4: is an elevation of a counterboring appliance generally similar to that shown-in Fig. 3, the tool and spindle, however, being slightly modified. Fig. 5 shows a further modification of the tool. Fig. 6 is an end view of the tool shown in Fig. 5. I

Referring first to Fig. 1, a rotatable tool 1 of suitable description is therein shown as mounted upon a support or spindle 2. As herein exemplified the tool is disposed in its counterboringposition. The spindle is hollow. at least for a portion of the length thereof, and a pin 3 having cam shaped porti one is positioned in the recess in said stem. The lower extremity of this pin ispreferably cammed or flattened upon opposite sides thereof as at 4c, and corresponding flattenedportions 5 are formed in the pin at a suitable distance from the lowerend thereof." As-be'stshown-in Fig; Q the'stem has a plurality oftransverse holes 6, 6, which extend inwardly from the outer cylindrical surface thereof and open into the recess 7, within which is disposed the pin3. Preferably these transverse holes should have their outer ends swaged or slightly reduced in diameter in order to retain the preferably ball shaped dogs 8, 8, which are fitted thereinto; and these dogs can hence only be dislodged inwardly when the pin '3 has been withdrawn. A cross-pin 9is driven through the upper extremity of the pin 3 and extends-out through slots 10 which are suitably positioned in the stem 2, the said slots preferably extending longitudinally of the stem. The respective extremities of the pin 9 extend through the opposite sides of a slidably mounted collar 11 which is carried by the spindle 2, the slidablemovement of the collar being limited by the length of the slot 10. A longitudinal movement of this collar with respect to the spindle will therefore correspondingly displace the pin 3. For reasons hereinafter set forth. I also prefer to pro vide a depression or flattened portion12 on one side of the pin 3, against which is adapted to bear the inner extremitv of a set screw 13 which extends through the wall of the spindle 2. Slot 12 is somewhat shorter than slot 10 so that when the set screw is in substantiallv its innermost position, thelongitudinalmovement of the said pin 3 will not be as great as when the set screw 13 has been slightly withdrawn. 7 \Vhen the set screw 13 is inwa dly disposed the pin 3 may be moved upwardly until the lower end of the slot 1&- encounters the said screw. and when in this position the flattened portions 4 at the lower extremity of pin 3 permit dogs 8 to drop or to be pushed inwardly. preferablv ent rely within the'same, as shown in Fig. 2. When in thisiposition, the tool 1 mav be pushed over the end of the stem without hindrance. This tool has recessesor pockets lt formed in the flat or nou-cutting face of the tool, which are ada ted for the reception of the portions of the dogs 8 and 8 which mav project from the spindle: and the dogs 8 are so disposed that when the in 3 has been moved downwardly sufficientlv to force them into their tool-engaging position. the upper extrem t of slot 12 will encounter the screw l3. If the tool 1 has been pushed upwardly upon the spindle while the dogs8 were in receded position, itlis merelv suffiicient to push the collar 11 aownwardly, are. thereb'ylfalsotheipin 3, to

a light spring 16 in thereby urge the said dogs into their outermost position and to firmly lock them there. The tool 1 may then be dropped down and rotated so that the dogs 8 may enter the pockets l4, firmly locking the tool against rotation or downward displacement with respect to the stem. Assuming now that it is desired to counterbore a flange through which a bolt hole has been formed, it is merely necessary to introduce the spindle 2 into the bolt hole so that its free extremity projects a sufficient distance through the flange to permit the tool to be properly positioned thereon; the tool is pushed over this projecting extremity and the collar 11 is moved toward the tool to project dogs 8, adjacent the extremity of the spindle. These dogs enter the pockets of the tool when brought into alinement therewith, and the spindle 2 may then be drawn upwardly in the usual manner and rotated in the proper direction for cutting the surface to be finished or bored. After this operation has been completed the collar 11 is drawn upwardly, if the spindle be directed downwardly, allowing the tool to fall from the lower extremity of the said spindle, which latter may then be withdrawn from the flange.

In order to provide against inadvertent displacement of the collar 11 while boring, a set screw 15 may be provided therein which is adapted to lock said collar firmly injthe desired position upon the spindle. Assuming now that it be desired to finish the upper surface of the flange, a tool 1 substantially similar to tool 1, but preferably having the cutting teeth thereof oppositely directed, is run up over the extremity of the spindle while the dogs 8 are in retra cted position. In order to permit the dogs 8 to be driven outwardly, it is necessary to retract screw 18 which permits pin 9 to travel upwardly to the limit of the slots 10. This action not only allows the dogs 8 to more inwardly in the manner described, but causes dogs 8 to be forced outwardly by causing them to engage the cylindrical surface of the pin 3 immediately below the lower extremities of the flattened portions 5. The collar may then beset firmly in position by means of screw 15, and the pockets or recesses 14 in the upper surface of the tool 1' will receive the projecting portions of the dogs 8 and lock the tool against rotation, the tool being held firmly in engagement with dogs 8 by reason of the pressure exerted by the work. In some cases I provide the upper extremity of the recess 7 of the support or spindle; the said spring bearing downwardly upon the upper end of pin 3 and normally tending to drive it into its outermost pos tion. This is of advantage when the appliance is used particularly for counterboring purposes, for

which it is primarily intended. It may then become unnecessary in certain cases to set up the screw 15, spring 16 being adapted to exert sufficient pressure upon pin 3 to hold the dogs 8 against inward displacement.

In Fig. 2 thepockets in the tool which receive the dogs are formed by merely slotting directly across the flat or non-cutting surface of the tool, as shown at 17. In Fig. 4 I have illustrated a still further modification of these pockets, slotted pockets 17 similar to those shown in Fig. 2 being formed upon the non-cutting surface of the tool, while auxiliary pockets adapted to hold the tool at a slightly higher level upon the spindle may be formed by drilling directly through the walls of the tool, as at 18, the drilled holes being preferably of very slightly less d ameter than that of the ball shaped dogs. The spindle 2 shown in Fig. 4 is somewhat reduced; but it is obvious that this support may be made of any suitable size and coin figuration. I further contemplate, in some cases, making special tools 19, of the type exemplified in Fig. Herein the tool while substantially cylindrical in general contour has cutt ng faces upon each end of the cylinder. The object of th s construction is to permit the tool to be disposed in counterboring position as shown in Fig. 5, or to be disposed in the usual boring merely sliding it up upon the proper distance. it being vide two separate tools, or to even reverse the tool. In order to accommodate the projecting portions of the dogs 8 and 8 in a tool of this character, pockets for the reception of said balls may be located in the manner shown in Figs. 5 and 6. said pockets opening as at 20 upon oblique surfaces of the cutting faces of the tool, and below the cutting edges 21 thereof.

In general, it will be seen that I have devised a very convenient means for locking the tool against rotation or inadvertent longitudinal displacement upon its spindle; the part, to wit, the collar 11, which controls the locking and unlocking of said tool being at all times accessible. By the use of an appliance constructed in accordance with the principles of my invention it hence be comes poss ble to surface or counterbore directly within a recess in a casting. for example. which recess may be barely large enough to receive a tool. and which may be so formed that it would be practically impossible to obtain access to a set screw, or the like. in the tool which might be used for locking the same in position, the form of the cavity in the casing being such that practically no implement could be utilized for manipulating said screw.

spindle the unnecessary to proposit on by erable modification without departing from Copies of this patent may be obtained for the spirit of my invention and I therefore do not desire to be limited except by the scope of the claims appended hereto. It

. may also be observed that in practice it is frequently possible to apply the cutter to its spindle or to remove it therefrom without stopping the driving mechanism of the drill press. or milling machine to which the spindle is attached by pushing the end 4: of the rod 3 upwardly to bring the flattened portion l into engagement with the dogs 8 which will permit the tool to slip over the end of the spindle. The weight of the rod 3 and the spring 16 will then act to force the rod downwardly and the dogs into the projected position to securely maintain the tool in position on the spindle. 7

Having described my invention, I claim:

1. The combination of a tool with a support therefor and means for operatively holding said tool at any one of a plurality of positions upon said support, said means comprising a plurality of tool engaging parts mounted in spaced relationship along the length of the support, said parts being movable into and out of said support, and means for disposing the desired tool engaging part in its tool engaging position, said means comprising a member carried by said support and adapted for movement with respect thereto.

2. The combination of a tool with a support therefor and means for operatively holding said tool at any one of a plurality of positions upon said support, said means comprising a plurality of tool engaging parts mounted in spaced relationship along the length of the support, said parts being movable into and out of said support, and means for disposing the desired tool engaging part in its tool engaging position, said means comprising a member carried by said support and adapted for movement with respect thereto, said member having cam shaped portions adapted for engagement -with the respective tool engaging parts.

3. The combination of a tool with a support therefor and means for operatively connecting said tool and support, said means comprising a dog carried by said support and adapted to be projected out from a surface of the same, said tool having a portion thereof adapted to engage the dog when so projected to operatively connect said tool and support, and means for normally holding the dogs in projected position. i

4. The combination of a tool with a support therefor and means for operatively connecting said tool and support, said means comprising a dog carried by said support and adapted to be projected out from a surface of the same, thereof adapted to engage the dog when so said tool having a portion five cents each.

projected to operatively connect said tool and support, and a spring actuated means for normally holding said dog in its projected position.

5. In a boring and facing appliance, a tool, a spindle for said tool having a recess in one side and near one end thereof, a dog adapted to lie in said recess and to be partly projected therefrom, said tool being adapted for locking engagement with said dog when the latter is in its projected position, a dogdisplacing rod normally engaging said dog to hold it in its projected position, said rod extending beyond the end of the spindle. said spindle having a recess therein adapted for the reception of said rod, a collar mounted on said spindle remote from said first mentioned recess, and a connection between said collar and rod, said spindle being slotted for the reception of. the said connection and to permit the movement of said collar along said spindle.

6. In a boring and facing appliance. a extending beyond the end of the spindle, adapted to receive a tool, a movable looking member positioned in said spindle near one end thereof, said member being adapted to be projected beyond the surface of the spindle to tool locking position, a movable member within said spindle having a part normally engaging and holding said locking means in projected position. said last named member extending beyond the end of the spindle whereby said member may be moved to disengage said part from said locking member.

7. In a boring and facing appliance, a tool holder comprising a spindle hollow at one end and adapted to receive a tool, said holder having a recess in said end and a dog therein adapted to be projected beyond the surface of the spindle to tool locking. position, a reciprocablerod in said spindle'normally engaging and holding said dog in projected position, said rod extending beyond the end of the spindle and having a flattened portion whereby the rod may be moved to bring the flattened portion into ongagement with the dog to release the latter from its projected position.

8. The combination of a tool with a support therefor, means operatively holdm g said tool at any of a plurality of positions on said support, said means including parts spaced along said support and movable into and out of said support.

In witness whereof, I subscribe my signature, in the presence of two witnesses.

OREN A. NIEMAN.

Witnesses:

WALDO M. CHAPIN, JAMEs DAn'roiiro.

by addressingthe Commissioner of Patents.

Washington, D. G. 

